You might have heard about GraphQL and how Facebook uses GraphQL in their mobile applications. In this blog, I will show you how to implement GraphQL in a Spring Boot application and let’s see what kind of magic does GraphQL provides. Why GraphQL? If you do not […]Continue reading
1. JdbcTemplate Introduction If we want to perform CRUD operations on a relational database the Spring ecosystem provides Spring Data JPA and Spring Support for JDBC. Spring Support for JDBC focuses on the JdbcTemplate class, which is internally based on the JDBC API of the Java SDK. Anyone who has ever worked with the JDBC […]Continue reading
Lists are common data structures in Java. Elements in a List have a specific order and can include duplicate elements. List have different implementations based on different use cases. The two key ones are ArrayList and LinkedList. Novice programmers often tend to use both the implementations interchangeably. However, both ArrayList and LinkedList have significant differences […]Continue reading
Timer is a utility class as a facility for Threads to schedule tasks for future execution as a background thread. You can use this class to schedule tasks for one-time execution or for repeated execution at a regular interval. In this post, I’ll explain how to schedule tasks in Java applications using the Timer and […]Continue reading
In Java, the HashMap and HashTable are both data structures that store data in key value pairs. When you store data in these, the key value is hashed, then is used as an index for fast access to the stored data. HashMap vs Hashtable HashMap Hashtable Introduced in Java 1.2 Introduced in Java 1.0, considered […]Continue reading
I’ve previously posted about defining Consumer Driven Contracts using the OpenAPI specification and Spring Cloud Contract. This approach works well because you can tie your contracts to your API specification, and also wire in a request validator into your contract tests. But one problem that remained is typically your OpenAPI specification will span multiple services. […]Continue reading
Sorting collections in Java is a common task. Java provides several different ways we can sort Collections. In this article, we will discuss the options we have to sort collections in Java. Understanding the java.util.Collections.sort() Method The java.util.Collections.sort() method is a crucial utility in the Java programming language, designed to order elements within a list. […]Continue reading
Iteration is the most common operations done on a collection. For example, you may want to go through all the student grades to find who has the highest test scores. In Java we have four methods for iterating over a collection, the methods are the for loop, iterator, forEach and lambda expressions. Setup Collection Here […]Continue reading
Today I’m going to show you how can you can use Docker to run MySQL Server in your development environment. Using Docker to run MySQL is much easier than manually installing it and for when you have multiple instances of MySQL running at the same time. I’m assuming that you already have Docker Community Edtion […]Continue reading
Problem You are given a string and are asked to write a method to return true if the string is a palindrome and to return false otherwise. A palindrome is a string that reads the same from front to back like alula They are many solutions to check if a string is a palindrome. I’m going […]Continue reading
